英文關鍵字
3d
abstract
animation
astronomical
astronomy
black
cosmos
design
device
discover
discovery
element
equipment
eye
find
focus
glass
icon
instrument
isolated
isometric
learning
lens
look
magnification
magnify
motion
observation
observe
ocular
optic
optical
planetarium
science
scope
search
service
sign
space
spy
spyglass
star
style
symbol
technology
telescope
tool
universe
view
watching